Note: the existing firmware is the one provided by the wifi service provider, which I am no longer using.

I want to update the firmware to the original version provided by TP-link. But is unable to find the link to download the firmware for the router.

This is the router page: https://www.tp-link.com/in/support/download/archer-c5/v4/

Where can I download the latest firmware for the same router?

My location is in India.